The I-80 westbound ramp from I-57 northbound was shut down for several hours Friday morning after a tanker truck carrying 8,500 pounds of propane came crashing off the roadway.
Authorities say the tanker was rolled off the I-80 westbound ramp just after 12 a.m. near I-57 northbound, coming down the embankment and into nearby brush.
The driver of the semi was transported to Advocate Christ Medical Center with minor injuries.
It is still unknown what caused the crash, according to police.
While propane didn't leak during the crash, fire crews were still on the scene after 6 a.m. working to carefully remove the wreckage to avoid causing a spill.
Firefighters said they were waiting for a crane to come and life the remaining pieces, which could take hours causing extensive delays ahead of morning rush hour.
Authorities said the earliest the I-80 westbound ramp was expected to reopen was after 7:30 a.m.
The Illinois State Police District Chicago is handling the investigation of the crash.